In this 15th installment in the 1st Godzilla series the aliens from the 3rd Planet From The Black Hole have salvaged the pieces of the destroyed Mechagodzilla and have reconstructed the space titanium menace. The space men wants Tokyo to be their New base of operations. They also have a human ally who can control a sea monster named Titanosaurus. The aliens are certain their mission WILL NOT fail. They are CERTAIN that Godzilla CANNOT defeat the two monsters. Can mankind's defender match his strength against these two horrendous monsters?